1-Chloronaphthalene is a classic halogenated naphthalene aromatic intermediate with wide applications in fine chemical industry, dye synthesis, pharmaceutical research and industrial auxiliary materials. It has high chemical activity on the naphthalene ring and can undergo substitution, coupling, alkylation and condensation reactions to synthesize various naphthalene derivatives. In the dyestuff industry, it is an important raw material for manufacturing vat dyes, reactive dyes and organic pigments with excellent color fastness. In pharmaceutical synthesis, it serves as a key building block for preparing anti-inflammatory, antibacterial and antipyretic drug intermediates. It is also commonly used as a high-boiling solvent, heat transfer medium and impregnating agent for microscopic analysis, as well as a raw material for synthetic resins, rubber additives and pesticide intermediates. Moreover, it is widely used in organic synthesis research and chemical reagent preparation, occupying an important position in the downstream industrial chain of naphthalene fine chemicals.

This chlorinated naphthalene compound is slightly toxic and irritant, with certain cumulative health hazards. Inhalation of its vapor can irritate the respiratory tract, causing dizziness, headache, cough and throat discomfort. Long-term skin contact may lead to degreasing, dryness, redness and allergic dermatitis. Eye contact will cause obvious burning irritation, conjunctival congestion and tearing. Accidental ingestion may induce nausea, vomiting and gastrointestinal discomfort, and long-term exposure may affect liver metabolic function. All operations must be performed in a well-ventilated fume hood; wear chemical-resistant gloves, safety goggles and protective mask. Keep away from high temperature, open flame and strong oxidants to prevent decomposition and harmful gas release. Store separately from food and daily supplies. Waste liquid and contaminated packaging must be disposed of strictly in accordance with hazardous waste regulations to avoid water and soil pollution and long-term ecological hidden dangers.